Negative Contractions
I'm not a student.
You aren't good.
He isn't an actor.
She isn't a dancer.
It isn't a dog.
We aren't friends.
They aren't astronauts.

Contractions and Not(another negative form)

I'm not a student.
You're not good.
He's not an actor.
She's not a dancer.
It's not a dog.
We're not friends.
They're not astronauts.

Interrogative Am I a student?Yes,I am a student.No,I'm not a student.Important : For yes/no answers,use contractions only for negative(No)short answers.
Are you good?
Is he an actor?
Is she a dancer?
Is it a dog?
Are we friends?
Are they astronauts?

Interro-negative Am I not a student?
Are you not good?
Is he not an actor?
Is she not a dancer?
Is it not a dog?
Are we not friends?
Are they not Astronauts?

Interro-negative Contractions

Aren't I a student?
Aren't you good?
Isn't he an actor?
Isn't she a dancer?
Isn't it a dog?
Aren't we friends?
Aren't they astronauts?Question Tags (used only while speaking)

Affirmative sentences with Negative tags
I am a student,aren't I?
You are good,aren't you?
He is an actor,isn't he?
She is a dancer,isn't she?
It is a dog,isn't it?
We are friends,aren't we?
They are astronauts,aren't they?Negative sentences with Positive Tags I'm not a student,am I?
You're not good,are you?
He's not an actor,is he?
She's not a dancer,is she?
It's not a dog,is it?
We're not friends,are we?
They're not astronauts,are they?

Imperative

Be good.Let's be friends.

Imperative Sentence gives commands,orders,requests and instructions and it always starts with a verb.Imperative sentence using verb "to be".

You(singular&plural) Imperative form : Be
We - Imperative form : Let's be

Imperative sentence is made with infinite verb(to be)but without to. Eg : Be happy.Command
Be careful.
Be good.
Be polite.
Be silent.
Be here on time.
Be there at 10 am.

Urgent/emphasis(add you)

You begood.
You be calm.

Request(add do/please/kindly)

Do be good.
Do be polite.
Do be calm.
Please be silent.
Kindly be silent.

Let's be good.Let's be polite.
Let's be calm.

By the end,you must be able to frame simple sentences and yes/no questions.